Why are most whitewater kayak paddle blades offset?
I'm a crappy OC1er, so I spend an inordinate amount of time thinking about stroke efficiency. I also row a raft, and have started kayaking. I can see why touring paddle blades are offset to decrease wind resistance during continuous paddle strokes...but why are whitewater blades offset? Why would anyone want to have anything other than a 0 degree offset paddle? While we're at it, why aren't raft oar blades asymmetrical? Kayak blades are assymetrical, highly engineered shapes designed to maximize efficiency - why are oar blades shaped like planks when they almost always interface the water at the exact same angle - especially when most boaters (right or wrong - different argument) use oar rights? I don't get it. Feedback please.